Cannot access Windows share

I am using Ubuntu 11.04, I can browse Windows shares using Gigolo and copy files from my fileserver running Server 2008.
Installed 0.5.1 using Synaptic ( the repository is still not updated), and could not browse Windows share ( file manager is Thunar)
Updated to 0.5.4, still cannot browse shares, the error is consistent after rebooting.
When I enter the URL, IP and share name, I get a generic error: TypeError: 'NoneType' object is not subscriptable